Shoe upper



FIG. 1 is a front perspective view of a shoe upper showing my new design;

FIG. 2 is a rear perspective view thereof; and,

FIG. 3 is a side view thereof.

The broken line showing of the bottom edge and the remainder of the shoe upper is for illustrative purposes only and forms no part of the claimed design. The portion of the shoe upper not shown in the figures forms no part of the claimed design. 

The ornamental design for a shoe upper, as shown and described. 